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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2012 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: TransformErrorListener.html 947 2014-11-12 22:14:09Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.xml;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import javax.xml.transform.ErrorListener;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import javax.xml.transform.TransformerException;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import org.slf4j.Logger;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>/**<a name="line.15"></a>
<span class="sourceLineNo">016</span> * {@link ErrorListener} implementation that logs the messages to a configured {@link Logger}<a name="line.16"></a>
<span class="sourceLineNo">017</span> * and throws exceptions in cases of errors and fatal errors.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * &lt;p&gt;<a name="line.19"></a>
<span class="sourceLineNo">020</span> * This class also optionally works around some stupid Xalan-J bugs:<a name="line.20"></a>
<span class="sourceLineNo">021</span> * &lt;ul&gt;<a name="line.21"></a>
<span class="sourceLineNo">022</span> * &lt;li&gt;Throw exceptions in the case of {@link #warning} also; this is required because Xalan-J<a name="line.22"></a>
<span class="sourceLineNo">023</span> *  reports even &lt;code&gt;&amp;lt;message terminate="yes"&amp;gt;&lt;/code&gt; messages as warnings&lt;/li&gt;<a name="line.23"></a>
<span class="sourceLineNo">024</span> * &lt;li&gt;When throwing exceptions, wrap them in {@link RuntimeException}s to avoid being swallowed;<a name="line.24"></a>
<span class="sourceLineNo">025</span> *  otherwise Xalan-J will not terminate on a &lt;code&gt;&amp;lt;message terminate="yes"&amp;gt;&lt;/code&gt;&lt;/li&gt;<a name="line.25"></a>
<span class="sourceLineNo">026</span> * &lt;/ul&gt;<a name="line.26"></a>
<span class="sourceLineNo">027</span> */<a name="line.27"></a>
<span class="sourceLineNo">028</span>public class TransformErrorListener implements ErrorListener {<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>    protected final Logger log;<a name="line.30"></a>
<span class="sourceLineNo">031</span>    protected final boolean xalanWorkarounds;<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>    public TransformErrorListener(Logger log, boolean xalanWorkarounds) {<a name="line.33"></a>
<span class="sourceLineNo">034</span>        this.log = log;<a name="line.34"></a>
<span class="sourceLineNo">035</span>        this.xalanWorkarounds = xalanWorkarounds;<a name="line.35"></a>
<span class="sourceLineNo">036</span>    }<a name="line.36"></a>
<span class="sourceLineNo">037</span><a name="line.37"></a>
<span class="sourceLineNo">038</span>    @Override<a name="line.38"></a>
<span class="sourceLineNo">039</span>    public void warning(TransformerException e) throws TransformerException {<a name="line.39"></a>
<span class="sourceLineNo">040</span>        this.log.warn(this.getLogMessageFor(e));<a name="line.40"></a>
<span class="sourceLineNo">041</span>        if (this.xalanWorkarounds)<a name="line.41"></a>
<span class="sourceLineNo">042</span>            this.rethrow(e);<a name="line.42"></a>
<span class="sourceLineNo">043</span>    }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>    @Override<a name="line.45"></a>
<span class="sourceLineNo">046</span>    public void error(TransformerException e) throws TransformerException {<a name="line.46"></a>
<span class="sourceLineNo">047</span>        this.log.error(this.getLogMessageFor(e));<a name="line.47"></a>
<span class="sourceLineNo">048</span>        this.rethrow(e);<a name="line.48"></a>
<span class="sourceLineNo">049</span>    }<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span>    @Override<a name="line.51"></a>
<span class="sourceLineNo">052</span>    public void fatalError(TransformerException e) throws TransformerException {<a name="line.52"></a>
<span class="sourceLineNo">053</span>        this.log.error(this.getLogMessageFor(e));<a name="line.53"></a>
<span class="sourceLineNo">054</span>        this.rethrow(e);<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>    protected String getLogMessageFor(TransformerException e) {<a name="line.57"></a>
<span class="sourceLineNo">058</span>        return e.getMessageAndLocation();<a name="line.58"></a>
<span class="sourceLineNo">059</span>    }<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>    protected void rethrow(TransformerException e) throws TransformerException {<a name="line.61"></a>
<span class="sourceLineNo">062</span>        if (!this.xalanWorkarounds)<a name="line.62"></a>
<span class="sourceLineNo">063</span>            throw e;<a name="line.63"></a>
<span class="sourceLineNo">064</span>        throw new RuntimeException("exception from XSL transform", e);<a name="line.64"></a>
<span class="sourceLineNo">065</span>    }<a name="line.65"></a>
<span class="sourceLineNo">066</span>}<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>




























































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